A U.S. Dollar set with major varieties introduces comparatively few new prohibitive rarities into the set, but with the 1794 and the 1870-S already there, it's hardly lacking challenges. As one might expect, most of the varieties occur in the pre-1804 coinage, though a few Morgan Dollar varieties will require a bit of patience. Few, if any U.S. denominations enjoy more popularity or collector interest than dollar coins, and this complete set certainly commands the respect and interest of virtually all U.S. numismatists.